Question

In the year 2000, the yearly consumption of oil throughout theworld
was approximately 25 billion barrels and increasingexponentially at
a rate of 5%. Assuming the world's total oilreserves are one
trillion barrels, in what year will the oilreserves be
depleted?
(Note: I have tried many answer already, but they were wrong.
Justto let you know 2014, 2015, 2073, 2074, and 2076 are all
incorrect.The correct answer would be greatly appreciated.)